Brace for tube frames in axminster looms



April 9, 1935. E. J. DACEY 1,997,045

I BRACE FOR TUBE FRAMES IN AXMINSTER LOOMS Original Filed Jul-y 20, 1952 ZZ/#27 J 5962;1/

Patented Apr. 9, 1935 PATENT oFFicE BRACE FOR TUBE FRAMES IN AXDIINSTER LOOMS Edward J. Dacey, Philadelphia, Pa., assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application July 20, 1932, Serial No. 623,583 Renewed September 17, 1934 Claims. (01. 139-9) This invention relates to improvements in Axminster looms adapted for the production, of fabrics wherein the pattern shows on the back, and it is thegeneral'object of the invention to 5 provide means for correctly, aligning the color yarns depending from an active tube frame to prevent the formation of imperfect tufts.

Axminster looms arranged to weave fabrics having the pattern appearing on the back may employ a series, of plates lying under the cloth board and arranged to be moved rearwardly in alignment with the reed dents to define guide aisles for the yarn tubes of the tube frame. The yarn tubes are placed in the aisles in a substantially horizontal position, projecting rearwardly with the color yarns almost horizontal. The tube frame is then rolled so as to move the yarn tubes downwardly between the'guide plates. The friction attending this latter motion of the tube frame bows the central portion thereof rearwardly, having the effect of leaving the'center color yarns behind the end yarns ofthe frame. The effect of this displacement of yarns is to cause uneven tufts and also long ends due to the fact that the color yarns are pinched between the reed dents and the guide plates.

It is an important object of my present invention to provide means to cause proper alignment of the color yarns prior to the tuft forming operation. To accomplish this I may employ brace means which will engage the tube frame and keep the same substantially straight during the wiping-in operation, so that at the time the yarn tubes are moving through the aisles, any tendency due to friction to bow the frame rearwardly will be checked. The arrangement may be such that the color yarns will be in front of the rear edge of the guide plates, thus preventing the pinching of color yarns between the plates and. reed.

It is. another. object of my invention to provide one or more brace arms which are moved into position after the tube frame has been moved to. wiping-in position, said brace arms acting. to push the-intermediate parts of .thetube frame forwardly against the frictional force derived from the guide plates and serving'normally to bow the tube frame.

It is a further object of my invention to provide the tube frame with a lifter shelf tocooperate with the brace arm, said shelf being located at a substantial distance above the upper shed of binder warps. By reason of this relation the tube frame may dip as low as the upper binder warps will permit, but the brace arm will nevertheless be effective to engage the shelves and support the tube frame.

' With these and other objects in view which will appear as the description proceeds, my invention residesin the combination and arrangement of 5 parts hereinafter described and. set forth in the claims. i

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a vertical central section through a portion of the loom having my invention applied thereto and showing the tube frame in cross section preparatory to pulling off,

Fig. 2 is a View similar to a portion of Fig. l but showing the brace in supporting relation with respect to the tube frame,

Fig. 3 is a top plan view of Fig. 2 taken in the direction ofarrow 3, V t

Fig. 4 is a view similar to Fig. 2 but showing the tube frame in a higher position,

Fig. 5 is a diagrammatic view showing certain successive positions assumed by the tube frame,

Fig. 6 is a detail top plan of Fig. 5, taken in the direction of .thearrow, with the parts in tuft forming position, and I 25 Figs. '7, 8 and 9 are diagrammatic views showing the tube frame in different positions.

Referring to the drawing, I have shown a loom frame in having a cam shaft II on which is mounted a spider l2. A cam patch 13 secured in adjusted angular position on'the spider opcrates a lever l4 pivoted about a fixed stud I5. An upwardly extending link I6 is interposed between the lever I4 and a supporting lever H, the latter being pivoted at l8 to a fulcrum fixed with respect to the frame. The lever i1 is provided with an arcuate slot IS in which is adjustably mounted a lifter pin 20. The latter is normally located below and is adapted forengagement with a lifter lever 2|. The forward end of lever 2| isslotted at 22 to receive a stud 23 about which pivots the upper end of a link 24. The lower end of the latter is pivoted as at 2 5 to a holder 26 having a vertical wall 21. Adjustably secured in verticalposition in the latter by means of bolt 28 is a brace arm 29. The holder is pivoted as at 30 to a lever 3| having an arm 32 and swinging about fulcrum l8. A rod 33 and surrounded by a compression spring 35,

.Nuts 36 afford meansfor varying the pressure of ,the spring.

The matter thus far described, except for the timing of the cam I3 and the form of the brace 29, may be similar to Patent No. 1,603,411.

The cloth board has a series of spaced rearwardly extending. teeth 4|, and the loom is provided with a lay 42. A series of guide plates 43 are mounted under and positioned to enter the spaces between the fingers 41. The guide plates 43 align with the reed dents 44 as shown in Fig. 6 to define guide aisles which are in substantial alignment with the fingers 4|. The guide aisles are sufficiently wide to receive the color yarn tubes of a tube frame designated gen erally at 5| and having a carrier bar '52 substantially rectangular in cross section. 'The color yarns are wound on a spool 53 and project dowm' wardly as at 54 below the bottoms of .the yarn tubes. I

In operation, thetube frame is moved from the transporting chain not shown by the usual mechanism and lowered toward the cloth, be-

ing rocked so as to project the yarn tubes rearwardly to the position A shown in dot; and dash lines in Fig. 5. The tube frame continues to rock, assuming first the light dotted line position 13 shown in Fig. '5, and then the heavy dotted line position C. The yarn tubes move forwardly or to the right as. viewed in Fig. 5 during this 'operation, the yarn tubes finally, assuming a vertical position with their lower ends below the bottom shed of binder warps. The tube frame is then moved up a short :distance to lift the LtIIbCS above the binders. The means for defining the guide aisles may be substantially the same as that disclosed in application Serial No. 575,190.

During the time that thetube frame is rocking in the manner described the guide plates 43 are in substantially the position indicated in .Fig. 6. If the .loom be wide the frictional engagement of the yarn tubes with the guide plates '43 is sufficient tobow the central or intermediate part of the tube frame rearwardly. The color yarns,

- beingflexible, are naturally curved rearwardly toward the position from which they moved forwardly, and this fact, coupled with the bowing of the tube frame, permits the center color yarns to project or extend behind the rear edges 6|! of the guide plates, so that as the latter assume some such position as shown in Fig. 6., these central color yarns will be pinched between the guide plates and thereed dents, thus'interfering with the proper movement of the color yarns during the cloth forming operation. A further defect growing out of the curved tube frame is the faulty position of the center color yarns. Because of their position they do not behave as do the end yarns, and'an uneven row of piles result. a r

In order to align the colorv yarns correctly incident to the aforesaid bowing of the tube frame,

I have provided means to supportthe tube frame, timing the cam l3 and the system of levers moving about fixed pivot l8 so that the brace '29 will engage the tube frame while the latter is in the process of rolling or wiping-in. .Each tube sion of spring 35. At this time the lifter pin 20 .is still below the lever 2|, with the parts in the position shown in Fig. 8 and corresponding ap 'proximately tothe position B .of Fig. 5. V

When the angular movement of the tube frame.

is completed the parts will assume the position shown in Fig. 9 with the toe under the shelf, the position correspcndingto that shown at C, Fig. 5.

The movements from this'point on in the cycle a follow those described in the aforesaid patent,

From the foregoing it will be seen that I'have' provided simple means for engaging the tube frame along 'a rear surface thereof to brace the same and prevent rearward bowing due to any frictional resistancewhic'h may develop as the yarn tubes move into the spaces between the guide plates. It will further .be seen that the toe of the brace slides along the portion 1| of .the' angle section-and ultimately engages the shelf 62. During the time that the tee is in operative engagement with the tube frame rearward bowing. is prevented, and the guide. plates can engage the reed dents to define guide aisles without danger of pinching the color yarns. a j

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be tothe details herein disclosed, but what I claim 1. In =a loom operating with-binders, means below the binders to define guide aisles substantially parallel to the binder warps, a tube frame having yam tubes which move forwardly in the guide aisles and between said means, and means to prevent rearward bending of the tube frame as the latter moves the yarn tube forwardly.

.2. In a loom, a lay having reed dents, a series of guide plates to define with the reed dents guide aisles, a tube frame having yarn tubes movable forwardly between the plates, and means to :pre-

vent rearward bending of the frame as the tubes move along the guide aisles.

3. In a loom, a lay .having reed dents, a series or guide'plates in front of the lay aligning'with the reed dents to define guide aisles, a tube frame having yarn tubes movable forwardly between the plates, and means to prevent backward bending of the tube frame as the latter moves the yarn tubes forwardlybetween the plates.

4. In an Axminster loom, reed dents-having periodic forward motionsfguide plates in front of the reed movable toward the reed in alignment with the reed dents to'define'with the latter guide aisles, a-tube frame having yarn tubes with projecting color yarns, the tube frame movable forwardly from a rear position with the yarn tubes between the plates, and means to prevent the tube frame from bending rearwardly as said frame moves forwardly.

5. In an Axminster loom having a tube frame with tuft yarn tubes movable from a rear to a forward position during the wiping-in operation of the tube frame, a reed having dents, a series of guide plates aligning with the reed dents to form guide aisles between which the yarn tubes move forwardly during the wiping-in of the tube frame, and a brace to engage a rearwardly facing surface of the tube frame and prevent rearward bending of the frame as the yarn tubes move along the guide aisles.

6. In a loom operating with binder warps, a tuft yarn tube frame, a series of elements effective independently of the binder warps to define guide aisles along which the tubes move, the frame and elements having a relative movement in a direction tending to bend the frame rearwardly, and means operative to prevent bending of the tube frame during said relative movement.

7. In an Axminster loom, a tube frame movable during the tuft forming operation from a rear position forwardly and then upwardly to pull off yarn for a subsequent tuft forming operation, a series of guide aisle forming plates between which the tuft tubes extend when moving forwardly, and means operative prior to the completion of the upward pulling off motion of tube frame to require the tube frame to assume a straight form without rearward beinding.

8. In an Axminster loom, a tube frame movable during the tuft forming operation from a rear position forwardly and then upwardly to pull off yarn for a subsequent tuft forming operation, a series of guide aisle forming plates between which the tuft tubes extend when moving forwardly, and means operative prior to the completion of the upward pulling off motion of tube frame to exert a forward force on the tube frame and straighten any bend produced in the tube frame incident to forward motion of the yarn tubes between the plates.

9. In an Axminster loom operating with binder warps, means defining guide aisles substantially parallel to and below and independently of the binder warps, a tube frame having yarn tubes from which project color yarns, the tuft tubes movable forwardly between the guide aisle defining means and the latter tending to bend the tube frame rearwardly, and means to cause alignment of the color yarns when the tube frame is in forward position.

10. In an Axminster loom operating with binder warps, means independent of and located below the binder warps defining guide aisles substantially parallel to the binder warps, a tube frame having yarn tubes movable forwardly during the wiping in operation through the guide aisles and thereafter having a pulling off operation, the tuft tubes having color yarns projecting therefrom, the means tending to bend the tube frame rearwardly during the wiping in operation,

and means to align the color yarns projecting below the binder warps prior to the pulling off operation of the tube frame.

11. In an Axminster loom, spaced elements defining parallel guide aisles below the binder warps, a tube frame having a wiping in operation during which the tuft tubes of the frame move forwardly betweensaid elements and a subsequent pulling off operation, the elements extending below the tuft tubes and tending to cause rearward bowing of the tube frame with resultant non-alignment of the color yarns projecting from the tuft tubes during the wiping in operation, and means other than the weft thread tending to cause alignment of the color yarns prior to the pulling off operation of the tube frame.

12.'In an Axminster loom, spaced means defining guide aisles, a tube frame having tuft yarn tubes to pass through the guide aislesand a supply of color tuft yarns for the tubes, a nose board up which the weft and color tuft yarns move in the tuft forming operation, the tube frame movable forwardly from a rearward position with the tubes between said spaced means and the latter extending below the tuft tubes and tending to bend the tube frame rearwardly, and means independent of the weft tending to align the color yarns prior to the start of the movement of said color yarns along the nose board.

13. In a loom, a lay having reed dents, a series of guide plates to define with the dents guide aisles, a tube frame having yarn tubes movable in the guide aisles, a bracket on the tube frame, and means to engage the bracket and prevent rearward bending of the frame as the tubes move along the guide aisles.

warps, a tube frame having yarn tubes which move forwardly in the guide aisles and between,

the plates, a rearwardly extending projection on the tube frame, and a brace to engage the projection and prevent rearward bending of the tube frame as the latter moves the yarn tubes forwardly.

15. In a loom, a series of plates under. the binder warps defining guide aisles substantially parallel to the warps, a tube frame having yarn tubes movable from a rear inclined position to a forward upright position, the yarn tubes being between said plates during the forward movement of the tube frame, a rearwardly extending projection on the tube frame, and a brace to transmit pressure to the tube frame under the projec tion while the tube frame is inclined and the yarn tubes are moving between the plates to prevent rearward bending of the tube frame.

EDWARD J. DACEY. 

